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Extraction by reversed micelles of triton N-42 for the spectrophotometric determination of cetyltrimethylammonium bromide

“…The determination limit for cetyltrimethylammonium bromide was lowered from 1 × 10 -6 to 2 × 10 -7 M, the volume of the extractant was reduced from 50 to 5 mL, and the preconcentration factor was increased from 2 to 100. The precision of determining low concentrations of cetyltrimethylammonium bromide by the proposed procedure is competitive with that of potentiometric and fluorimetric procedures [2,3] (corresponding data in [4] were absent). Table 2.…”

“…Quaternary ammonium salts, in particular, cetyltrimethylammonium and cetylpyridinium halides are most commonly used. The determination of their low concentrations in natural, potable, and wastewater is an important problem because of the high environmental stability of these compounds [1].Modified potentiometric sensors were successfully used to individually determine 10 -6 to 10 -3 M alkylpyridinium chlorides [2]. Total cationic surfactants can also be determined by the extraction-fluorimetry using Eosin (analytical range is 10 -8 to 10 -6 M) [3] and extraction-spectrophotometry using Bromophenol Blue (analytical range is 10 -6 to 10 -5 M) [4].…”

“…Modified potentiometric sensors were successfully used to individually determine 10 -6 to 10 -3 M alkylpyridinium chlorides [2]. Total cationic surfactants can also be determined by the extraction-fluorimetry using Eosin (analytical range is 10 -8 to 10 -6 M) [3] and extraction-spectrophotometry using Bromophenol Blue (analytical range is 10 -6 to 10 -5 M) [4].…”

A New Nanocatalytic Spectrophotometric Assay for Cationic Surfactant Using Phosphomolybdic Acid‐Formic Acid‐Nanogold as Indicator Reaction

“…Therefore, it has important significance to develop new ways to detect cationic surfactant for controlling the pollution of environment and enhancing the protection of water resource. There are several methods to detect cationic surfactant now, such as spectrophotometry, [7][8][9] electrochemical sensor method, [10,11] flow injection analysis, [12] capillary electrophoresis method, [13,14] high performance liquid chromatography, [15,16] gas chromatography, [17] resonance scattering spectral assay, [18,19] diphasic titration [20] and so on. The electrochemical sensor, capillary electrophoresis and gas chromatography needed to use organic solvent, with low sensitivity and long analytical time.…”

Calcium‐Selective Electrodes for Measurements in the Presence of Anionic Surfactants

“…The development and application of electrodes for sensing of surfactant flourishes, and a number of formulations have been described for measurements of anionic [9][10][11], cationic [11][12][13], and also nonionic surfactants [11,[14][15][16]. Contrary to this, studies of the surfactant interference with ionophore-based cation selective ISEs, including Ca 2 + -ISEs, were somehow abandoned.…”